Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828599 | Method for producing glass tubing of a narrowed diameter | Victor Demjanenko | 1989-05-09 |
| 4818266 | Apparatus for producing glass tubing of a narrowed diameter | Victor Demjanenko | 1989-04-04 |